There are 11 human faces in this picture. Or more. How many will you see? In 1 minute, ordinary people find from 4 to 5 faces, observant — 8, advanced — 10, psychologists from God — all 11 and even more.
In any case, this is a good training not just for observation, but for the ability to understand and feel people. Get used to looking at faces, guessing facial expressions, and your attentiveness, your ability to understand people will increase.
Looking at and guessing facial expressions was a favorite pastime of Leonardo da Vinci, who recommended stains on old walls for this. We hope that this picture is not worse than the old walls. I wish you success!